Remove `add-snippets` input #8255

Job	Run time
Split workflow (ubuntu-latest, linked)	1m 28s
Split workflow (macos-latest, nightly-latest)	1m 50s
Split workflow (macos-latest, linked)	1m 48s
Split workflow (ubuntu-latest, default)	1m 11s
Split workflow (macos-latest, default)	1m 42s
Split workflow (ubuntu-latest, nightly-latest)	1m 26s
	9m 25s

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